Combined typewriting and computing machine



Patented May 23, 1922.

I0 SHEETS-SHEET I.

INMENTOFC H. L. PITMAN.

COMBINED TYPEWRITINC AND COMPUTING MACHINE.

APPLICATION FILED MAR. I3, I9I9.

H. L. PITMAN.

COMBINED TY PEWRIT|NG AND COMPUTING MACHINE.

APPLICATION FILED MAR. I3, 1919.

Patente May 23, 1922.

IU SIIEETS-SHEET 2.

INVENToFvV n @am AU NEY.

H. L PITMAN. COMBINED TYPEwRmNG AND COMPUTING NAcHlNE.

' APPLICATION FILED IIIAII. I3. I9I9. v 1,417,106, Patented May 23, 1922.

I0 SHEETS-SHEET 3f vIIIIIIIIIIIIIIIIIIIIIIII 1NvENTR= 2 @ma man H. L. PITMAN. COMBINED TYPEWRITING AND coMPUTlNG MACHINE.

' APPLICATION FILED MAR.13,1919. 1,417,106. Patented May 23,1922.

' l0 SHEETS-SHEET 4.

INVENTOR:

FIGA;

ATTOEY..

H. L. .P-ITMAN. COMBINED TYPEWRITING AND COMPUTING MACHINE.

APPLICATION r1LEDmAn.13.1919. 1,417,106, Patented May 23, 1922.

'I0 SHEETS-SHEET 5.

BY y

ATToRN 5%;

H. L. PITMAN.

COMBINED TYPEwRmNG AND COMPUTING MACHxNE.

APPLICATION FILED MAR.13.1919. Patented May 23, 1922.

10 SHEETS-SHEET 6.

H. L. PITMAN.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

APPLICATION FILED MAR. I3, I9I9. 1,417,106. Patented May 23, 1922.

I0 SHEETS-SHEET ATTO - -H. L. PITMAN.

COMBINED TYPEWRITING AND COMPUTING MACHINE.v APPLICATION FILED MAR. I3, 1,919.

1,417,106. n Patented 1II[ay23,1922.`

. FIGI.

I l/ 40 f f .m f l @VIZI H. L. PITMAN. COMBINED TYPEWPIITING AND COMPUTING MACHINE.

APPLICATION PILED IAAII. 13. 191D. 1,417,106. I I Patented May 23, 1922.

10 SHEETS-SHEET e.

H. L. PlTMAN. COMBINED TYPEWRITING AND COMPUTING MACHINE. l

APPLlcATloN FILED MAn.1s,1919. 1,417,106. Patented May23, 1922.

' 10 sHEEssHEET xo.

INVENTOR- w27/@Www l ,UNITED s'rAilss PATENT oFFici-z.

HENRY PITMAN, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO UNDERWOOI) COM.. PUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION 0F NEW YORLK A GOMBINED TYPEWR'ITING AND COMPUTING MACHINE.

T o all w71 om it may concern.'

Be it known that I, HENRY L'. PrrMAN, a citizen of the UnitedStates, residing in Elizabeth, in the county of Union and Statev of New Jersey, have invented certain new and useful Improvements' in Combined Ty ewriting and` Computing Machinespof which the following is a specification.

This invention relates to combinedr typewriting and computing machines, of the kind disclosed in the application of Gustave O. Degener, No. 201,626, filed November 12. 1917, Anow Patent No. 1,347,621, granted July 27, 1920, and in my application, No. 241,390a filed April 28, '1915 (now Patent No. 1,308,506, granted July 1` 1919).

The invention is illustrated in connection with the standard Underwood Addendagraph combined typewriting andcomputing mach-ine, but it is not confined thereto. The computing mechanism is of the masterwheel type, the master wheel being driven by a reciprocatory rack having suitable operating connections from power-driven, key` controlled mechanism.

The letter-spacing movementsy oi' the type-4 writer carriage produce relative movements between the master wheel and the computing wheels, so that numbers may be run into the totalizer, order by order, under con-. trol of the number type-keys. y

Upon depression of any number typekey` the valuating device corresponding therewith is brou rht into co-operative relation with said rac which drives the master wheel. The computing mechanism is driven from a spring motor, which is released upon each depression of a number key and caused to complete one cycle of movement, as a result of which the master wheel is caused to rotate the computing wheel with which it may engage, to an extent corresponding to the particular number key de# pressed. l

The spring motor is re-wound by an electricmotor when the motor is about exhausted; the motor circuit being automatically reopened when the spring motor is fully rewound. y

It has been hereto-.tore proposed, in devices of the above-mentioned character, to have the number key merely release or trip Specification of Letters Patent.

Patented May 23, 1922.

Application filed March 13, 1919. Serial No. 282,277.

the motor-driven mechanism, and to have the motor-driven mechanism supply all of the energy forA operating the computing mechanism and for also positively driving the type-bars and causing them to print.

YT his would make the touch of the-computing keys lighter thanlthe touch of the alphabet keys. In other words, the touch of the number key would Ibe lighter when used in connection with the computing mechanism than when simply typing a number. power-driven mechanism should ybe coupled directly to the type-bar mechanism, upon the initial depression of a number key, the parts connected with the number key would be moved by said power-driven mechanism rapidly awa from the finger, and then would be forcibly returned beforethe iinger could be removed.

In overcoming the above-mentioned objections, I' provide vpower-driven means to actuate the computing mechanism, and cause the number keys merely to act to release the power-driven mechanism; the latter is ineffective to complete the V-printing formity of touchv between the number keys and the alphabet keys, and makes the touch of the number key the same during comput- -ing operations as during non-computing operations.

l Provision is made tol prevent any possibility of repeated rinting and feeding of the typewriter carriage without' computing, by locking the typewriter carriage 'against ,feeding movement. This is preferably done by locking the carria e-escapementdevices in their actuated position, and consequently holding the typewriter carriage until the latter part of the return stroke of. the typeactioii, when the locking means is actuated to release thel carriage-escapement devices,

saidmeans being under the control ofthe number keys.

'action of the type-bar, so that, when com- A full-stroke device is providedforthe number keys, which is actuableA by means controlled by the escapement devices, to render it effective forlthe down and up strokes of the number keys, compelling the operativein order to restore a depressed key to its normal position, to fully depress the same and elther actuate the escapement mechanism and print the number computed, or actuate the escapement mechanism without printing. On the return stroke of thekey, the full-stroke device is effective to prevent a repeated actuation of said key before the locking means for the escapernent mechanism has been released to permit the carriage to feed.

Improved means is also provided to lock the carriage, for maintaining co-operative relation between the master Wheel and the computing wheel. The locking means may comprise a pawl and an actuating element therefor which may be actuated by the power-shaft; the connection between the pawl and the actuating element being such as to prevent any possible backpressure against the power-shaft from said pawl when the latter is in its actuated position.

Simplified and improved means is pro-` vided to silence or renderI ineii'ective the computing mechanism, so that numbers may be typed without computing the same; provision being made so that the silencing i means may be actuated by a non-compute key and by a case-shift key.

Simplified and im roved means is provided'in the connections from the electric motor to the spring motor, and the means for operating the switch for the electric motor.

-Means is provided to prevent the spring motor from unwinding from the end at which the energy is stored. This means comprises a check which is automatically rendered ineffective when the energy is being stored in the spring motor, said check being made automatically effective to lock a train of connections between the electric mo tor and spring motor', thereby preventing l the spring motor from giving 0H its energy to the electric motor, when the latter is at rest.

A finger-piece is provided by which the actuating and valuating mechanism may be reversely rotated to restore it to its normal position in case the mechanism becomes locked. p

To reduce noise' and shock, and conse.

quently wear and tear between co-operating kparts of the machine to a minimum, yielding connections have been provided between some of the co-operating parts.

An effort has been made to simplify and reduce the number of parts of the machine and to render certain parts readily adjustable, thereby reducing to a minimum the ne- DESS.

cessity of accurately constructing the parts, and consequently reducing the cost of manufacture of the machine.

Other features and advantages'will hereinafter appear.

ln the accompanying drawings,

Figure l is a side elevation of the machine, as lviewed from the right, certain parts being broken away, and parts being omitted for ,the sake of clearness.

Figure 2, is a diagrammatic, pers ective view, showing the releasing means or the power-driven mechanism and certain of the parts oi' the actuating mechanism and locking mechanism, all of said parts being indicated in their normal positions.

Figure 3 is a top view oi' the motor-set, including the spring motor, the electric mo torand the switch, and the switch-operating means for controlling the supply of energy from Vthe electric motor to the-spring motor.

Figure 4 is a top view of the valuating and actuating mechanism, which isrlocated under the motor-set, the latterbeing removedl and allV parts being represented in their normal positions, and certain parts being broken away for the sake of clear- Figure 5 is a sectional front View, taken on the line 5-5 of Figure 1,. and shows the motor-set, the 'connections between the elec tric motor and the springmotor, and the connections between the spring motor and the valuating and actuating mechanism, some of the parts being omitted for the sake of clearness.

Figure 6 is a detail view of the check be. tween the spring motor and the electric motor, and shows the ineffective position to which the check is automatically moved while energy is being stored in the spring motor.

Figure 7 is a view similar to Figure 6, and shows the check effective to prevent any backward rotation of the gear connected to f the springl motor.

Figure 8 is a skeleton perspective view, as seen from the back of the machine, of the escapement devices, and shows part of the mec anism controlled thereby for shifting the full-stroke device associated with the number keys.

Figure 9 is a skeleton perspective view of some of the number key-levers and the fullstroke device.

Figure l0 is a detail View, in perspective, ofparts of the valuating and actuating mechanism, the parts being disassembled for the sake of clearness. f

Figure 11 is a fragmentary top view of parts of the valuating and actuating mechanism corresponding to two dillerent values, the part at the right being represented in its normal position, and that al the left being represented in its actuated position, as when selected for operation by the depression of a number key.

. Figure 12 is a sectional view, taken on the line 12-12 of Figure 4, looking in the direction of the arrows at said line and showing part of the train of gearing for transferring energy from the spring motor to a powershaft .or cam-shaft, and also showing the cams and followers which control the operation of various locking devices of the computing mechanismsa1d parts being shown in their normal positions. The means by which the power-shaft may be restored to its normal positionl is also shown yin this View.

Figure 13 is a sectional view, taken on the line 13-13 of Fig. 4, looking in the direction of the arrows at said line, and show- -ing the valuating and actuating mechanism,

and the yielding element for connecting parts of said mechanism to the number keys and type-bars, all parts being shown in their normal positions.

Figure 14 is a view of part of the same mechanism as inl Figure 13, showing the parts after a number key has been depressed tov select its corresponding valuating member, the valuating cam and the parts operated thereby being indicated in their effective'operating positions. i

Figure 15'is a detached view' of the disconnect or non-compute key, and mechanism controlled thereby, for rendering the computing mechanism ineffective when it is desired to print withoutcomputing; a connection being also shownffor operating the disconnect mechanism from the case-shift mechanism, the parts being shown with the motor-releasing device moved to its ineective position.

Figure 16 is a skeleton diagrammatic view ofthe actuating mechanism controlled by the number keys; the parts being shown with a key slightly depressed, and sufficient to releasethe power-shaft, the escapement lock being rendered eiective and in readiness to lock the typewriter-escapement 'on full depression of said key.

Figure 17 is a skeleton diagrammatic, detached view of the same mechanism shown in Figure 16; the co-'operating parts of thev typewriter escapement mechanism being shown in the positions they assume after the number key has been completely actuated, and shows the typewriter-escapement mechanism locked in its actuated position.

Figure 18 isa skeleton diagrammatic viewV of part of .the master-wheel-operating mechanism, together with a carriage-lock for preventing relative sidewise movement between the masterwheel and the computing wheels,

" locks for controlling the movements of the computing mechanism. said -`carriage-look and the associated Iockmg mechanism being indicated in the positions which they assume during the rotation of a computing wheel by the master'wheel.

Figure 19 is a detail vlew of part of the operating mechanism for the carriage-lock and its associated parts intheir norma-l positions. Y

Figure 20 is a skeleton diagrammatic view of one of the valuating cams and the train of mechanism yoperated thereby, for effecting an extent of .rotation of the master wheel corresponding in value to the number represented by said cam.

Figure 21 is a diagrammatic view of a cam and mechanism operated thereby, for lowering the master-wheel-driving-rack out of driving relation with the master wheel, in preparation for its return to normal position afterl a computing operation has been effected.

Figure 22 is a detached view of the cam and associated mechanism by which the master-wheel-driving-rack is returned to its nor- Number type-keys 3() and alphabet typekeys 31 swing key-levers 32 about their fulcrum 33, against the tension of adjustable4 return springs 34, to rock bell-cranks 35,

about their common fulcrum 36; the upper ends of said bell-cranks being effective to swing type-bars 37 upwardly and rearwardly about their fulcrum 3.8,- to cause types 39 to print against a work-sheet (not shown), carried by acylindrical platen 40, rotatably supported in a carriage 41. The carriage is constantly urged from right to left of the machine by means of a spring drum 42 connected thereto by a suitable strap 43; the carriage being permitted to move in said directiomduring printing operations of the type-bars 37, by means of escapement devices including a curved universal bar-44, Jforming part of a floating frame 45, which is moved rearwardly during theV latter part of the printingv stroke of the 'type-bars by ried at its rear end by a pivoted frame 47,

comprising a rock-shaft 48, and is, provided with a cross-bar 49 which engages with a dog-rocker 50 to swing theupper end thereof rearwardly about its pivot 51, to move a loose dog 52, carried thereby, out of-engagement with one of thc teetl 453 (Figures 1 and 8), on an escapement wheel 54 and bring a fixed dog 55 into the path ofthe previouslyengaged tooth 53. (Figure 17). The loose dog 52, after it becomes disengaged from the tooth 53, is swung about its pivot 56 and to-` during a computing operation, and various1 wards the rightin Figure 8, by means of a spring 57, and is arrested bv a stop 58; the escapement wheel being at this time held by the xed dog 55. Upon the return movement of the universal bar, which is caused by the usual return spring 59, the loose dogA enters the space between the previously-engaged tooth and the next tooth; the escapement wheel then becomes 'released from the fixed dog 55 and is rotated by means of the spring drum through the intermediary of a pivoted rack 6() on the typewriter carriage, which rotates a pinion 61 having the usual one-way connection with said escapementv wheel. During this movement, the next tooth of the escapement wheel engages the loose dog to swing it about its pivot 56 against the tension of the spring 5T, connected thereto, until it is finally arrested by a fixed stop 62 at the upper end of the dog-rocker 50; the

carriage having at this time'moved through one letter-space position.

The platen may be shifted from lower to upper-case position, so as to print with upper-case types 63. F or this purpose, there is provided the usual case-shift key 64, which, when depressed, swings a lever 65 and an arm 66 thereon about the fulcrum `rod 33. the arm engaging to swing a shiftframe 67 about its pivot 68. The shiftframe comprises a rail or bar 70 which is moved upwardly to shift a platen-carrying frame 71, through the intermediary of a roller 72, secured to said frame, and which normally travels back and forth on said shift-rail. rlhe platen is supported in said platen-frame and may be assisted in its upward movements by the usual counterbalance spring (not shown), which is usually coiled around a rock-shaft 73, supported on the carriage 41; said rock-shaft having forwaidly-projectingl arms 74 secured thereto, one at each end thereof, said arms engaging at their forward ends with a shaft 75 comprising the platen axle.

Thecomputing mechanism may comprise one or more computing .heads or totalizers 76, adjustably mounted on a computer-carriage or truck 77, arranged to vtravel on a xed guide-rail 78, and with the typewriter carriage 41; the computer-carriage and the typewriter carriage being connected to each other for this purpose by one or more arms 80. Each totalizer may comprise a plurality of dial wheels 81, arranged in denominational order; said dial wheels 81 being in driving relation with intermediate computing Wheels 82, which, as the carriage passes through a computing zone, are brought seriatim into effective relation with a master wheel 83'. The master wheel is secured to a shaft 84, rotatably sup orted in an actuator 85, and may be rotate either additively or subtractively, by driving mechanism under the control o'f the number keys 30, which will hereinafter be described.

The valuating and actuating mechanism, which is preferably located at' the back of the machine, may comprise a power-shaft or driving shaft 86 ('Figures land 5), which is constantly urged in a counterclockwise direction by means of a spring motor 87, which may be automatically wound by an electric motor 88 in a manner hereinafter clearly described. The power-shaft 86 is prevented from rotating, however, by means of a holding pawl 90 which engages with a dog 91 connected to said power-shaft, said pawl 90 being under the 4control of the number keys. `The power-shaft 86 has rigidly secured thereto a set of Valuating cams 92 (Figures 4, 5 and 13), one for each number key, from 1 to 9, inclusive. Each valuating cam has associated therewith an interponent 93 which, at the depression of the corresponding number key 30, is brought into effective relation with its valuating cam by suitable .indexing mechanism, hereinafter described, so that said interponent may be swung in a counterclockwise direction, by said cam upon the rotation of the powershaft, after a release of said shaft is effected by the number key, to rock a. valuating shaft 94 through an angular distance equal in value to the associated valuating cam. The valuating cams are of different heights (Figure 13), and consequently the valuating shaft 94 may be moved through different angular distances, by means of the various valuating cams. AThese movements of the valuating shaft 94 may be transmitted to the master Wheel 83 by means including a downwardly-extending arm 95 (Figures 1 and 20), secured near the right-hand end of the valuating shaft 94, said arm having connected thereto a link 96,. which is drawn rearwardly to swing a bell-crank 97, about a rod 98, upon which it is pivotally supported; the rod 98 being conveniently supported in a main frame 100 of the typewriter. Thebell-crank pulls downwardly on a link 101 to rock a shaft 102 by means of an arm 103, extending rearwardly therefrom and connected to the link 101. The shaft 102 extends into the actuator 85 and has secured at its inner end a downwardlyextending arm 99, which is effective to move a driving rack 104 forwardly by means of a connecting link 105 (Figures 2 and 20), the driving rack having previously been moved into effective meshing relation with a inon 106, from the position indicated, in igures 1 and 2, by suitable means hereinafter described. The pinion 106 is rigidly secured to a shaft 107, which has also a large gear-'wheel 108 secured thereon, the latter being' adapted to mesh with either one of the pinions 110, 111, according to whether the machine is set for addition or subtraction, as shown and described in my coending application, Serial No. 81,574, filed arch 2, `1916 now Patent No. 1,345,102 granted June 29, 1920, and thus rotate the master wheel additively or subtractively through in a counterclockwise direction, to push a:

connecting link 116 rearwardly and swing the three-armed member 112 in a counterclockwise direction. An indexing element, in the form of a cam slide 117, is connected to each three-armed member 112 at 118 to be moved downwardly thereby, as will hereinafter appear. A slight depression of the number key 30, as shown in Figure 14, and consequently a slight actuation of the threearmed membery is effective to release the power-shaft, the latter then being effective to cause the indexing and valuating of the number corresponding in value to the actuated number key.

To release the power-shaft 86, pins 120 are provided (Figures 2.and 13) on the threearmed members 112, which normally rest against the upper prongs121 of forked members 122 to rock a shaft 123, uponwhich they aregrigidly mounted. The rock-shaft or mo- 'tor-release-shaft 123 is moved in a clockwise direction by said three-armed members to rock a bell-crank 124 (Figure 16), suitably secured to the right-hand end of said shaft, to pull a link or actuating member 125 against the tension of a spring 126 connected between said link and the holding pawl 96. The actuating member 125 is provided with a tooth 127, which engages with a tooth 128 on the holding pawl 90 to swing the latter in a counterclockwise direction about 'its pivot 130, and out of the path of the dog 91 on the power-shaft 86, thus releasing the power-shaft, so-that it may be rotated by thespring motor which is connected to said power-shaft through the'medium of a pinion 131 secured to the power-shaft (Figures 5 and 12). During the` first part of the rotation vof said power-shaft 86, acam 132, secured thereto and near the right hand there-y of, engages with aroller 133 on the bell'- lcrank 124, by which the motor-release-shaftI 123 is then rocked.' Justprior to the instant of release of the power-shaft 86 (Figure 16),

the pin 120 on the three-armed member 11,2--

enters aslot 134 in the'forked member 122, and thus becomes coupled to the motor-release-shaft 123. 1t-will be seena that a continuedmovement of the rock-shaft, which is now caused by the cam 132, is effective to of the corresponding interponent 93 on the.

valuating shaft, or, in other Words, bring said interponent into effective relation with the associated valuating cam 92 on the power-shaft 86. To do this, the downward movement of the cam-slide 117 is effective to` swing Ia member 135 (Figures 4, 10 and 13), pivotally mounted at 136 on a crossbar 137; the memb`er`135 being connected to said slide 117 by means of a pin 138 projecting from the member 135 and into a camslot v140 in said slide. The upper end or head 141 of the member 135 engages between twosides 142 of the interponent 93 to move Yit laterally and lengthwise of the valuating shaft94, to bring a roller 143, on said interponent, into effective relation with the valuating cam 92 on the power-shaft 86 (Figure 11).

j The movements of the various parts are so timed that the roller 143 on the interponent 93 is moved into effective relationI with the valuating cam 92 before the powershaft 86 has rotated sufficiently to bring the cam ,portions 144 of the valuating cam into engagement with the roller 143; in other words, the indexing operation is first accomplished, after which the value of the number is transferred to the valuating shaft 94. When the cam portion 144 engages thi1 roller 143, the interponent 93 is swung in a counterclockwise direction (Figure ,14), and through the intermediary of an adjusting screw 145, the purpose of which will vpresently be described, engageswith a standard 146 secured to the valuating shaft, to rock the latter until it is arrested by a stop or abutment 147l on the associated cam-slide 117 githe' stop 147 having previously been lowered into the path of a set screw 148 (Figure 14) on the standard 146.

The adjusting screws 148 are providedto permit adjustments of' the valuating shaft relatively to the stops 147, whichare of different lengths, so that the shaft may be accurately stopped in the various positions to which it may be rocked by the valuating cams 92. The adjusting screws 148 are threaded into the standards 146 and are held intheir adjustedpositions thereon by lock nuts 150. It will be seen that by the indi: ,vidual adjusting screws 148, any inaccuracy which may be due to the manufacture of the various parts entering into the arresting of 'the valuating shaft may be readily overcome. To rigidly secure the standards 146 on the valuating shaft 94 the latter has fiats 151,

. formed thereon, (Figure 13), on which the standards 146 are seated; each 4standard havl nut is tightened on said vshank,to avoid any possibility of then'ut becoming loose by vibrations caused by the 'actuation of the machine. It will be seen that the part of the standard 146 nearest to the shaft 94 is narrower than the upper part through which the set screw 148 is threaded. CThis permits the interponent to move laterally on the shaft durlng an indexing operation.

' The interponents 93 are provided with projections 156, which normally rest against sleeves or collars 157 on the valuating shaft. Each interponent comprises two walls 142 which may be joined together by a bolt 158 and a bridge 159 Figures 10 and 13); the latter having two ownwardly-bent ears 160 y throu h whlch the set screw 145 is threaded.

It "wl be seen that by means of the adjusting screws 145, the inter onents are adjustable relatively to the stan. ards 146, so that there will .be'no binding or lost motion of the parts between the valuating cam 92 and the stop 147 when thel interponent 93 has been actuated its full extent (Figure 14). The Set screws 145 may be held in their adjusted positions by lock nuts 161.

The various movements of the valuating shaft 94 are transmitted to master wheel 83, as hereinbefore described, by-means includin the arm 95.

t is preferable tohave the driving rackv 104 normally out of co-operative relation with its associated pinion 106. From this4 it follows that it is first necessary to raise the rack 104, from its Figure 1 position, into effective relation with the pinion 106, Figure 18. This is done during the early part of p the rotation of the power-shaft, and may take place durlng lthe indexing of the interpo.`

nent ,93.v To raise the rack 104,there is provided near the left-hand side of the powershaft 86 a lifting cam 162 (Figure 2), which is effective to rockl a bellcrank 163 about a supporting rod 164,"through the, intermediary of a roller 165 on an arm 166l of said bell-crank. The vbell-crank 163 pulls rearwardly on a link 167, connected to a downwardly-projecting arm 168 of said bell- .crank, to rock a bell-crank 170 about the rod 98. The bell-crank is adapted to pull downwardly on a link 171, to rock a means of an arm 173, secured thereto, to

which the link 171 is connected. Said shaft is conveniently supported ne'ar the upper and forward part of the machine, and has secured thereto a downwardly-extendin arm- 174, which 1s swung in a clockwise ire'ction to pu'sh a link 175, and rock a shaft 176 in a counter-clockwise directionby means of an arm 177 extendin from said shaft and connected to said lin 175. The shaft 17,6.has

secured thereto a cam178 engaging with a forked arm 180 to swing the latter and rotate a shaft 181 from which said forked arm extends in a clockwise direction. The rockmechanism (fhereinbelfore described), conshaft 172, by-

v proj action` 200` of shaft extends into the actuator 85 and has secured thereto, at its inner end, a bell-crank` 182, which rocks with the shaft 181 in a clockwise direction to raise the driving rack 104l by means of a headed stud 183, on said bel l crank, which engages in a slot 184 in sald rack. To guide the rear end of said rack so that it moves parallel to itself, the bell-crank 182 is connected by a link 185 to a second bellcrank 186, loosely mo'unted on the rock-shaft 172; the loosel mounted bell-crank 1.86 having also a hea ed stud 187 engaging 1n a slot 188 formed in the rear end of the driving rack 104. AfteL the rack has been raised into effective relation with its associated pinion 106 (Figure 18), everything is in readiness to permit the indexed number to be transmitted to the master wheel 83 (Figure 20), as hereinbefore described, and 'consequently to the dial wheel 81.

In order that the rack lmay be restored to its normal position (Figure 1), after a valuating operation (Figure 20), it 1s first lowered out of engagement with the pinion 106. For this purpose, there is provided a rack which engages-with a roller 191 on the bellcrank 163, to swing the latter. in a clockwise direction, and by means of the intermediate nected thereto, swings the racklcarrying bellcranks 182 and 186 in counterclocking di-l rection's, to lower the driving rack 104 out of driving relation with the ,pinion 106.

' To restore the driving rack, after it is v100 disengaged from the pinion 106, there is provided a spring 192 connected between the valuating shaft 94 and an arm 193 loosely mounted on the valuating shaft (Figures 4 and 22). The arm 193 has a roller194 which 105 constantly bears against the periphery of a cam member 195 secured to the power-shaft 86 near the right-hand side thereof. The cam 195 normally occupies the position shown in Figure 22, where. the roller 194 110 rests on adwell 196 of said cam member.

. During the irks/t part of the rotative move ment of the power-shaft 86, the roller 194 rides on the dwell 196, until the driving rack L, 104 has been rendered effective and until the 115 computer-truck,k 77 has been locked by suitablemechanism, presently to be described. The roller 194 then rides down an incline .197. of the cam member 195. The indexing operation lmay take place between the time when 120 the' power-'shaftstarts rotating and when the roller 194 reaches that partof the incline 197 nearest to the shaft 86. It will be understood that the roller 194 is caused to ride down saidincline 197 bythe spring 192, 125

which swings the arm 193 out of engagement with the arm 95; engagement being made between said arms 95 and 193 by a set screw 198, o`n the arm 95, adapted to bear against a the arm 193 (Figure 22). 130

It will further be understood that the valuating shaft 94 is lpcked against actuation when the roller 194 is on the dwell 196. When the roller 194 has reached the lower part of the incline 197, however, the valuating shaft 94 is free to be rocked, through an Cangular distance corresponding in value to the actuated number key, by means ofthe associated valuating cam 9 2, as hereinbefore described.- The rack 104 is then lowered by the cam 190, as previously` described, and returned to its normal position (Figure 22), by the spring,

'V 192, when the roller 194 again rides up on the dwell- 196, thus again locking the valuating shaft 86 is again released. v

Thus it willbe understood that the spring 192 forms a yielding connection in the train of mechanism extending between the driving rack 104 and the cam member 195; and that by the constant bearing of the rollerv 194 on the eriphery -of the, cam member 195, noise is e iminate and a sudden shock avoided, which would be the result if the roller 194 25 were adapted to leave the cam member 195 and then re-engage it. It should be further understood that the sprin 192 is' effective to restore the train of mec anism connected po the arm 95, and that the. projection 200v may engage with the set screw 198v on the arm- 95 toassure the restoration of the train of mechanism, connected to the arm 95,.,in caseth'e spring 192' should fail, due to a possible'sticking of some of the parts.

It is desirable to lock the computer-carriage 77, 'so asto maintain the'engagin relation between the master wheel`83 an the ,computin wheel v82, while a number is being trans erred .to the dial wheel 81 of the 40 totalizer 76. This may be done by means of a carriage or truck-lock-pawl 201secured toa rock-shaft 202 (Figures 1, 18 and 19),

arranged near the upper and forward part of the machine, said pawl normally occupyingn a position, shown in Figures 1 and 19; thepawl being adapted to be swung into effective vrelation with suitable teeth of a rack 203 (Figure. 18), formed on `said computer-carnage 77.

with the rack 203 of the computer-carriage, there is .rigidly secured to the power-shaft 86 a carriage-lock camA 204, which, as thepoWer-shaft rotates, engages with a bell-y shaft against actuation until the powerj'ftion, there is To render the carriage-lock 201 e`ifectiVe-,- or, in other words, swing it into engagement be guided by the rockshaft 202. The link or actuating member 210 is provided with a cam slot 212, into which projects. a pin 213 on an arm 214 so that the latter may f, be actuated by said cam slot 212, to swing the rock-shaft 202, to which the arm 214 is secured, in a clockwise direction to move the pawl 201 into engagement with the rack 203', and consequently lock the computer-carriage or truck 77. 75v

To relievethe power-shaft of an possible back 'pressure that may be cause by the engagement of the locking pawl 201 with the computer-carriage during a locking operaprovided at the upper end of the cam slot 212 a dwell 215 upon which the pin'213 rests (Figure 16).I It will be seen that when the arts accupy this positiorn-thc truck-lock-sha t 202 is locked v y" the link 210.

A carriage-lock-releasing-cam 216 is secured to the power-shaft 86, which engages with a roller 217, secured to an arm 218 of the bell-crank 205, to positively restore the truck-lock 201 and the intermediate mechanism to normal position, after the driving rack 104 has been lowered.

It will be seen that when the power-shaft 86 is released, the pawl 90 is swung about its pivot 130 and away from a stop v220 against which it normally rests (Figure 2). When the Apaw] 90 has moved clear of the dog 91 on the power-shaft, a tail 221 on the actuating member 125 is engaged by a downwardly-projecting finger 222 .on said pawl 90, to move the member 125 about its pivotal connection 223, on the bell-crank 124, in' a counterclockwise direction to ,take

the tooth`127 out of engagement with the tooth 128 on said pawl, thus settingv the pawl 90 free of the actuating link 125 and permit'ting the pawl to be restored to its normal position by the spring 126. To'insure that the pawl 90 get back into the path of the dog 91, so as to be readyto arrest the latter when the movement oi the powershaft is completed, there is secured to the power-shaft'86 a cam 224,' which may eri-- gage with a tail 225 (Figure 17) of the pawl 90, to move the latter into the path 115 of the dog 91. It should be understood that under ordinary conditions, the-spring 126 brings the pawl 90 back into the path of the dog 91, but in case the action of the pawl should be sluggish, the cam 224 is effective "120 'todrive it home to its normal position.

To .absorb the shock at the end of the stroke of the power-shaft, when the dog 91' `re-engages the holding pawl 90, and also to reduce the noise caused thereby, to a mini- 125 i.

mum, there is -provided a spring 226, one end of which is connected to a collar 227,

secured'to the power-shaft 86 (Figures '2,`- 4 and 5), the other end being connected to a y pin 228, extending from the dog 91'; the 130 i spring 226 being elective to 'urge the pawl 236 and a bridge 250 near theright-hand 90 ina counterclockwise direction aboutv end plate 237; said bridges extending bethe shaft 86 and hold it in the lower end tween and being secured to the bars 238 and of a slot 230 in the cam 132 on the power` 240. The three-armed members 112 are ro shaft. It should be understood that the dog vided with hubs 251, which separate tiem 91 is pivotally mounted on the power-shaft fromv each other and hold them in their 86, and that with the above-described conproperpositions on their supporting rod 113. struction, the power-shaft may. overthrow The forked members 122 (Figures 4 and slightly after the dog 91 re-engages the 13), and the bell-crank or motor-release-arm holding pawl 90; the pin 228, at this time, 124 are provided' with projections 252 enmay occupy a position in the upper part of gaging in a slot 253 in the shaft 123, and are the slot 230. After the shook has been secured to said shaft between collars 254 by absorbed, .the power-shaft 86 may return nuts 255 at the ends of said motor-releaseslightly until the pin 228 again rests in thc Shaft 1223-' bottom of the slot 230. The motor-release-shaft is located between To facilitate quick and accurate assem' theright-hand end plate 237 and the bridge bling of the various elements 190, 162, 131, 2489 Mld S PVOtally SllPpOrted 011 bearing 216, 204, 92, 227, 132, 224 and 195, from left pins 256, which may be similar in constructo right (Figure 5), on the power-shaft 86, OD t0 the PDS 242.

so that they may be placed in proper rela- A guide-bal 257 (Figures 4 and 13) iS SetOn thereon Without any adjustment, the cured to the bridges 248 and 250, and is propower-shaft has therein a kerf 231, adapted vided with slots 258, in which the upper ends to receive projections 232 on the various ele- 0f the Cam Slides 117are guided; the bar ments, as shown on the valuating cams 92, 257 serving as a backing foreach slide when Figures 5, 13 and 14. The various elements the SOP 147 theleOIl S engaged by the Set v are held properly spaced from each other screw 148 (Figure 14). The bar 137 upon by the sleeves or Collars 157, which are 0f which the members 135 are pivotall'y mountvarious lengths.l The ends ofthe valuating ed is also secured to the bridges or plates shaft 86 are threaded to receive nuts 234 be- 248 and 250. tween which the various elementsA and the The master Wheel 83 is normally locked collars 157 on the shaft may be bound against-actuation. and is held in alignment ti htly together, said nuts permitting also with the teeth of the computing wheels 82, og an adjustment of the various `elements as SO that the .latter may readily mesh therea whole, lengthwise of the shaft, with, by a holding tooth 259 (Figure 18) The dog 91, as previous] stated, is loosely on a lever 259, pivoted at 260; the tooth enmounted on the power-sha t 86, and, for this gaging between the teeth of the. master v purpose, it is supported on a hub 235 (Figwhee1. The lever 259 is adapted to be swung urel 5). formed on one of the sleeves 15 fabout its pivot, to release the master wheel, a

' ing the dog tight on the shaft when the nuts also secured, and which is rocked by the cams l 234 are tightened.

lthe hub 235 being a trifleP longer than the by means of an arm 261 secured to the rockthickness of thevdog 91, so asto avoid bindshaft 202, to which the carriage-lock 201 is 204 and 216 on the powershaft"'86, as here- The power-shaft is supported (Figure 5) inbefore described. The cams 204 and 216 in a frame comprising two side plates 236', are so timed relatively to the cams 162 and 237, secured to a front cross-bar 238 and a 190, which raise and lower the driving rack rear cross-bar 240 (Figures 1, 4, 5 and 13) 104 into and out of engagement with the pinthe cross-bars 238 and 240 beingsecured to a ion 106, that the driving rack is in meshing base frame '241 (Figure 1), upn which the relation with said pinion before the holding main frame 100 of the typewriter is also setooth 259a is moved out of engagement with cured. The power-shaft is pivotally mountthe master wheel 83; and that upon the ed on beari'n pins 2x42 (Fi re 5), secured restoration of the parts to their normal poin the side p ates 236 and each pin havsitions, the holding tooth 259al engages the ing a' reduced portion 243 which enters a master wheel before the driving rack 104 is holeY 244 in the'end 'of the shaft 861, The lowered out of engagement with the pinion bearing pins 242 are Asecured in place on the 106. From'this it will be understood that acplates 236 and 237 by screws 245 which are cidental displacement of the train of gearing threaded into the ins 242 to expand them Ibetween and including the master wheel 83 within holes 246; t e pins\being split at 247 Aand the pinion 106 is prevented.

for this purpose. Ther tens-carry-over mechanism may be ,The three-armed\members 112 (Figures 4 like that shown and described in the apand 13), which are actuated by the numberplication of `Grustave O. Degener, herein rekeys 30 to actuate the motor-release-shaft, ferred to, and a description of whlch, 1sV are pivotally mounted on the rod 113, which thought unnecessary 1n the present case. extendsfbetween and is suitably supported by In order that the to ch required to actua bridge 248 near the left-hand end plate ate the number keys 1 rder to print there- `alphabet keys, provision is made in the connections extending between the number keys and the actuating mechanism including the three-armed 'members 112, so that the actuating mechanism is ineffective to pull up the type-bars 37 to cause themv to print against the platen 40. This may be .done by providing yielding connections, comprising springs 262 (Figures 1, l()` and 13) between the links 116 and 'thei'three-armed members 112; one end of each spring 262 being connected to a pin 263 projectingfrom an adjustable member 264, rigidly secured to the link 116, by means of a screw 265'; the other end of the spring 262 beingvconnected to a pin 266 on an arm 267 ofthe three-armed member 112. The pin 266 is normally Yheld in'the end of a slot 268 formed in the member 264, which may be moved lengthwise of the link 116, in order to adjust its length, and may be secured in place bythe screw 265. To assist in holding the member 264 on the link 116, it is provided with fingers 270, which partly surround the end of the link 116. Thus, it will be seen that when the power-shaft 86 is released by one of the number keys, the key becomes connected/t0 the motor-release-shaft 123, bythe threearmed member 112, the latter` being then actuated by the shaft 123. This movement of the three-armed member 112, in addition to performing the indexing operation, previously described, pulls on the link 116 through the spring 262 to swing the typebar 37 towards the platen. When the heel -16 of the type-bar engages the universal bar 44, the forcey thereof is counteracted by the luniversal bar-return-spring 59,- and is consequently arrested before the type reaches the platen, assuming that the operative has actuated the number key with a lighter touch than that required for the alphabet keys 31. When the type-bar has been arrested by the universal 1oar, the movement of the threearmed member 112 is continued to-colnplete its stroke, during which time the connect-ing spring 262 yields. Obviously, in the depression of a numeral key, the resistance arising fromactuating the motor-releasing mechanism must be overcome, and then the depression of the key is assisted due to the tensioning of the corresponding spring 262. In order, therefore, to obtain the desired result, namely, of having the touch, necessary for printing, substantially the same for both alphabet and numeral keys, it is necessary to have springs 262 of sufficient strength to compensate for the resistance incurred in the earlier part of a numeral key-stroke. From the foregoingit will be understood that, in order to print the computed number, and feed the carriage 41, the number keys may be actuated with the same touch required for the alphabet keys, and that a lighter touch may start said computing mechanism Without printing.

In the Underwood machine, the momentum of an actuated type-bar is depended upon to effect printing by the types thereon on a sheet of paper carried by the platen. A numeral key'may, therefore, bc depressed to start the computing mechanism and to actuate the escapement mechanism without printing. The operative may, therefore, determine,vmerely by the manner of actuating the numeral keys, whether computation is to be accompanied by printing.

In the Underwood machine, the key-levers 32 flex slightly, so that they have a kind of cushion effect to the touch of the operative; this being due to the fact that the key-levers project considerably beyond their points of connection 271 with .the bell-cranks 35. In order to maintain this advantageous feature, the bell-cranks 113*1 are connected to the keylevers in back of the point-s of connection 271, or,- in other words, between the latter and the fulcrum 33 of the key-lever.

It is preferable to havethe bell-cranks 113a positively connected tothe key-levers 32, so that the key-lever-return-spring 34 may serve to return the connections extending to the actuating mechanism, and assist the spring 126, connected to the pawl and 95 the actuating link 125, in returning the motor-release-shaft 123.

In .reference to the computing mechanism, it should be understood thatthe numberv keys 30 are effective only to release the 100 power-shaft 86, as described, and that the cam slides 117 move idly downward until after the power-shaft is released, a dwell 272 (Figure 10) in the cam slot 140 of said slide being rovided for this purpose. The instant tie power-shaft is released, however, .the cam 140 is in a position to engage with the pin 138 on the -pivoted intermediate member to swing the latter about its pivot 136, and thus shift the corresponding inter- 110 ponent 93 into effective relation with the valuatingcam 92, as hereinbefore described. The upper end of said cam slot is also provided with a d well 273 wherein the pin enages to hold the interponent against lateral displacement while it 1s in 'effective relation with the valuating cam.

The escapement mechanism, including the dog-rocker 50, is actuated, as hereinbefore described, during the latter. part of the up-u 120 ward movement of the `type-bar 37 when the heel 46 engages with the universal bar 44. With this construction, it maybe possible to again print and actuate the escapementv mechanism before the actuating link has 125 re-engaged the pawl 90, which controls the power-shaft 86. This would result in repeated printing of the same number and feeding of the carriage 41 without effecting repeated computations.

'ing and eedin p Without computing, there is provided a locksecured.

To avoid any possibility of repeated printo the typewriter carriage ing means or a holding means, which may be rendered effective during the initial part of the movement of any one of the number keys, so as to be ready to lock the dog-rocker in its actuated position, and thus hold the carriage against feeding movement untii the number key has been returned sutliciently to permit the power-shat't-releasing devices to re-engage.

The holding or ict-king means, Ytor the carriage 41, may comprise a pawl 274 (Figures 1, 4, 16 and 17), pivoted at 275 on a bracket 278, secured to the bA `'d rEhe locking pawi 274 is adapted to be moved in a counterclockwise direction by a siiitable spring 277, but heid in iA *11, ve positionilligure 1), by a controlling saber 278, pivoted 280, which is connected by means ot a link 281 to an arm 282 of the bell-crank member 124 on the motor-release-shait 123, so that the controiling member 278A may be swung away from the locking pawl 274 when the motor-release-shat is actuated by the depression of a number key 30, as hereinbeiore described, thus permitting the locking pawl 274 to be rendered effective als in Figure 16, where it rests against the lperiphery oit a cooperating'member 283. This happens during the early part oit the actuation of the .number key. A further depression ot the key to the position shown in Figure 17 causes the universal bar 44 to be actuated, thus swinging the carrying trame 47 about its pivot including the rock-shaft 48. A downwardly-projecting arm 284 on the rockshaft 48 moves therewith in a clockwisedirection, and engages, by means of a pin-andslot connection 285, to actuate an arm 286 and rock a shaft 287, to which said arm is The rock-shaft 287- has secured thereto and near the right-hand side thereof an upwardly-projecting arm 288, which pulls forwardly on a link 290 to swingthe cooperating member 283 about its pivot 291 in a counterclockwise direction; they locking pawl 274 dropping into a notch 292 of the member 283, Figure 17, to hold it, and con-- sequently the dog-rocker 50 in its actuated position; the eseapement wheel being at this time held by the fixed dog 55 of said dogrocker. A spring 289 is connected to the. link 281 and the bracket 27 6 to return the link 281 and the connected parts.

The parts are so ytimed that the locking pawl 274 becomes released when the parts have resumed a position from which the motor may again be released. To insure this pawl 274 'from the notch 292, by the return movement of the controlling member 278, or, in other words, the releasing of the dogrocker 50.

The co-operating member 283 comprises an arm 293 (Figure 16), and is adjustable relatively to said arm, and is held in place thereon by a screw 294, which passes through a slot 295, in said co-operating member. In a similar way, the controlling member 278 comprises an arm 296 and a screw 297, for the purpose oi adjustment, 'this adiustment being provided so that the locking pawl 274 may be rendered ineti'ective at 'the proper Means provided to prevent any bili f ot repeated compi xon in le -space position, W h couid o be eiected by permit 5 i back to a position wneie the holding pai/vl is re-engaged, and again operating the number keys 30 before the dog-rocker and consequently -the carriage are released trom the locking means inciuding the pawi This would permit the powershaft to again become released` to effect anotherlccmputation while the carriage is in the same letterspace position. rThis means may be in the form of a full-stroke device 297 (Figure l) for the keys 30, to compel the complete restoration ot the keys before they can again be actuated. The fuli-stroke device may be like that disclosed Iin my prior application, No. 81,574.

For the sake of clearness,"the full-stroke device will -first be described in connection With the down stroke of the number key 30.

It is essential that the full-stroke device 297 of the printing device, comprising the key 30 and the connected type-bar 37, and consequently cause the type-bar to print against the platen, thereby preventing any possibil- -ity of actuating the number key 30 to an extent which would release the power-shaft 86 and cause a computation without printing. Each number key has pivotally mountedl thereon a pendant 298 (Figures l and 9), the lower end of which is guided in a suitable plate 300. Each pendant 298 is provided with aseries of teeth 301, with which a pawl 302 is adapted to engage during the depression of the number key 30, to prevent the return of Said key until the pa-wl 302 is moved out of engaging relation with the teeth 301, which occurs at the extreme endof the downward movement of the number condition, the tooth 127 on the actuatingQ ke 30.

link 125, connected to the motor-release-shaft 123, moves into effective relation with the tooth.128 on the holding pawl .90, immediately prior to the withdrawal of the locking he moving of' the pawl 302 out of engagement with the teeth 301 is caused by a controlling member 303, in the form of a bellc'xrank (Figure 8), pivotally mounted at 304 izo 

